A lot of my genealogy is significantly helped by considering if possible ancestors were in plausible walking vs. boating distance. You then need to prove connec

A lot of my genealogy is significantly helped by considering if possible ancestors were in plausible walking vs. boating distance. You then need to prove connections, of course, but quickly ruling candidates out because they'd have lived days of walking through mountains apart even though it "looks close" today has saved a lot of wasted time.